Fourdrinier wire



FOURDRINIER WIRE Filed March 5. 1925 INVENTOR Patented July 27, 1926.

uirao STA This invention relates to improvements lin wire fabricssueltas are used on Fourdrinier paper making machines and its object isto lmprove such fabrics-and to provi'de a Fourdrinier Wire of greaterstrengthA and of longer vwearing quality than those heretoforeavailable.

y Another object of the invention is to pro- 1 viole a Fourdrinier wirewith strengthening El@ elements which do not interfere with its)required drainage'characteristics. v

These and otherobjects will a pear fro the following specification inwhich l will describe the ,invention and will 'point out its il@ novelfeatures in the appended claims.

F ig. l of the drawings is a plany view of a Fourdrinier wire which ismade accordin to and embodies the present invention, an

Fig. 2 is a view on a larger scale 0fa-` smallerportion of the improvedfabric illustrating the novel construction thereof, the view eing asubstantially plan view but showing the fabric slightly tilted in ordertmore clearly show its construction. I v` The fabric when made accordingto my invention comprises the usual transverse wires or weft whichareall of one diameter and are equally jspaced apart, and groups of adesired number of the usual longltudinal vor warpwires 11. Y r)These arealso of one diameter which-may be the samel as that ofthe transverse.wires and all of themy in each group are equally spaced apart. Thesetransverse and longitudinal lwires Jare woven in the usual way.' llnEig. 1,1 have shown the groups of, longitudinal wires as containing fourwires each, but this Y., is solely Xfor illustrating purposes, as anydesired number may be used inI each group. The two of these groupsshownl in Fig? 1 are designated by lthe reference t numerals 412 Y'and13. y

' Between the proximate wires of adjacent Y groups' 'is -a spacesubstantially twice as great as that between the other longitudinalWires.` In these spaces are strengthening elements, each of whichcomprises) two wires` and 21, preferably of smaller diameter than thatvof the other wires, and these are woven into the fabric in the novelmanner illustrated. The wire 20 goes overw one `of the 'transverse wires10 and under the next one, while theJ wire 21 'goes under the' first` fapplication mea Match 3,

therefore, interlinked with each other and JOSEPH oNErLL, oF PourCHESTER, NEW YORK.

, rounnmmna wma.

1925. Serial No. 12,817.

mentioned of these transverse wires and over the next one so that theyalternately 55, andoppositely pass over and under adjacent f transversewires.

l. have lfound that in order to get the desired strengthening effect,the wires 20 and l y 21 should be put together as closely as possibleand they, in fact, come. in contact with each' other where they cross-between each ot' the transverse Wires. They are,

with the transverse wires. @5

'/lt is well known that the Fourdrinier wire or apron is an expensivepart voft that type of machine on which they lare used` and that theyarev subjected to so muchwear that theirlife is limited. I am aware of70.'

the facty that attempts have been made to strengthen Foui'drinier wiresby. providing pairs of longitudinal wires which pass alternatelyfandoppositely over and under adjacenttransverse wires but these have not 75met the requirements of paper makers. lnl the first place, they havealways been of the same diameter as` that of the otherw longitudinalwires so 4that where they are located, the wire has in it lines ofundesir- 8 able thickness, which cause grooves in the paper as it isformedf. In the second place, although they have been spaced apartslightly, they interfere materially with the required drainagecharacteristic 'because of 85' the tact that these ysmall drainagespaces become clogged.

nMy novel construction, however, overcomes both of these dilicultiesvwhen the wires of the strengthening elements are made ofsmallerdiameter than that of the other longitudinal wires.' It has been foundin actual practice that wires made according to this invention ontlast.those heretofore available and that they are fullyas efectivej in everyother particular. f t Where slight grooves in the paper yare notundesirable, it is possible to use wires in the strengtheningelements'of 'the saine diameter as that of the othervlongitudinal 10o 'i`myself to the use of smaller strengthening .chine,f buta's it is alsouseful for bolting and straining purposes, I intend no limitations otherthan those imposed in the appended claims.`

What I claim is: y

1. A wire fabric comprising a plurality of transverse wires of likediameter equally spaced, v(groups of longitudinal wires of similariarneter also equally spaced, with the Space between adjacent groupssubstantially double that between the. wires of the groups, andstrengthening elements intermediate the groups, said strengtheningelements each comprlsing a pair of wires of smaller diameter alternatelyoppositely J1,593,668 A J- passing over and under adjacent'transversetially double that between the wires of the groups, and strengtheningelements intermediate the groups, said strengthening elements eachlcomprising a pair of wires'of smaller diameter alternately andoppositely passing over andv underladmcenlt transverse wires crossingand in contact with each other between the transverse wires.

In witness whereof, l have hereunto'set my hand this 27th dayvofFebruary, 1925.

' JosErH'oNErLa.-

